The
Pacific's are probably the most common parrotlet. Males can be distinguished from
the females due to bright blue streaks behind the eyes and a bright blue rump. If
you want a large parrot in a small package these are the pets for you. They are only
5-6 inches and are smaller than some budgies. There not great talkers but, they are
vocal and not loud. Links: International
Parrotlet Society

Yellow-Collared Macaws
(Ara auricollis)

The Yellow Collared is considered a
mini-macaw verses it's bigger cousins. These come in at 15-16 inches. Though
mostly green through the body, their wings are blue and tail is red and blue. They have
the same demeanor as the larger macaws and can be treated the same way. Their natural
distribution is southern Brazil, Paraguay, and north-western Argentina.